What Does It Mean to Say That the Heritability of a Trait

question 80

Multiple Choice

What does it mean to say that the heritability of a trait is 70 percent?

• A)30 percent of a person's expression of that trait is due to environmental factors.
• B)70 percent of a person's expression of that trait is due to heredity.
• C)70 percent of the variability of that trait in a group is accounted for by genetic variation.
• D)The correlation between identical twins should be approximately +0.70 for that trait.

---

Definitions:

Electron-Transport Chain

Series of electron carriers in the inner mitochondrial membrane; they receive electrons from NADH and FADH2, using the electrons in the formation of ATP and water.

Glycolysis

Glycolysis is a series of enzymatic reactions that break down glucose into pyruvate, producing energy in the form of ATP, and occurs in the cytoplasm of cells.

Lactate Formation

The conversion of pyruvate into lactate by anaerobic glycolysis, often occurring in muscles during intense exercise.

Acetyl-CoA

A molecule that plays a key role in metabolism, particularly in the synthesis and oxidation of fatty acids, and the Krebs cycle.